Hose coupling



E. J. SHAFFER Nov. l5, 1932,

HOSE COUPLING Filed June 1. 1951 2 Sheets-Sheet 1 E. J. SHAFFER HOSE COUPLING Nov. 15, 1932,

Filed June 1. 1931 2 Sheets-Sheet 2 fo M 4 2/6 e. 7 ,a #j 5 w J 5 l lill/I4. 5

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This invention relates to improvements in hose couplings, and particularly to a novel clamp for securing the end of a flexible hose to a coupling member.

The invention is intended Afor use in situations where very high pressures are encountered, as, for example, in rotary well drillin operations. To those. acquainted with t is class of work it is known that at times pressure within the hose builds up very rapidly from "a normal pressure of around 800 ounds to onel of several thousand ounds; and it is the primary purpose of my invention to provideK a construction for a hose v1li coupling that will eiect a leak-proof joint between the hose and coupling member which will successfully withstand such high pressure and that will not blow off under the strain thereof. 2o

that is very substantial ,and durable; that is thorou hly reliable; that is relatively sim.

as-I proceed to describe the invention 1n detail by reference to the accompanying drawings wherein Fig. 1 is an elevational view showing a coupling member secured to the ,end of a hose section in accordance with my invention; Fig. 2 is a section on the line2-2 of Fig.,1; Fig. 3 is a longitudinal section through the parts illustrated in Fig. 1, the planes of sectlon on opposite sides of the vertical center line being at an angle to each other, as indicated by the section line 3 3 of Fig. 2; Fig. 4 is a detail of the outerslips'; and Figs. 5 and 6 are views illustratinnr the manner of applying the clam` to the ose. In the drawings, where llike numerals 5 designate corresponding parts throughout Other objects are to provide a coupling the several views, 1 represents, conventionali ly, a portion of hose, which may be com osed `of a rubber and canvas or other suitab e rein forcing fabric, and 2 desi ates a couplmg member or nipple includln a relativelong tubular portion or shan 3 that is orced into thevend of the hose. The end of the nlpple 2 opposite the shank 3 is designed to provide a coupling part 4 which, in the present instance, consists of an externally 00 threaded boss that is adapted to be received bg' ka complementary coupling part" (not s own), as will be readily understood. Inwardly of its threaded extremity 4, the nipple is formed with a wrench receiving por- I tion designated 5. Intermediate the shank '3 and coupling part 4, the nipple 2 is rovided with a circumferential iange 6 w ich is arranged to engage the end of the'hose 1 when the shank 3 1s properly-inserted. The 'I0 shank 3 is surrounded near its longitudinal center by a comparatively wide and deep bead 7 and on each side of said bead it is formed with a series of circumferential v ribs 8. l 75 Surrounding the end of thehose is what I choose'to-'term an outer set of slips 10 having inwardly directed'lips 11 at their outer ends which are engaged over the flange 6 of the nipple 2. The inner surfaces of the sli s are provided with transverse ribs 12, whlle their outer surfaces diverge toward the inner ends of the slips. The slips are definitely positioned with respect to the nipple 2V by .the cooperation ofthe lips 11 of the former with 55 the flange '6 of the latter, and the outer series of ribs 8 ofthe nipple are lso spaced as to occupy planes substantially midway between the planes of the ribs 12 of the sli s. An inner set of slips 15 surround` the ose in- 9 wardly of the set 10 and their outer ends abut the inner ends of the outer slips. It will be noted that the plane 'of contact between the two sets of sli s is coincident with the central plane'of t e bead 7 of the nipple. The 95 advantage of this will presently be explained. The slips ofthe lset-15 are formed on their inner sides with ribs 16 that are spaceds'ubstantially equal distances on opposite. sides ofthe planes of the inner series of ribs 8 `on 10 erably staggered with respect to those of the other set, so as to avoid continuity of suchline of separation from one end of the clamp to the other. f/

Sleeves 18 and 19 surround the respective sets of slips 10 and 15, and they are tapered to correspond approximately to the taper of the slips, and the lnner ends of the sleeves are :surrounded b flanges 20 and are provided with substantial ears 21 having bolt holes 22. The two sleeves are arranged with their ears 21 in alignment, and bolts 23 areengaged through the holes 22 thereof and have nuts 24 applied to their threaded ends. By means of these bolts the sleeves are drawn toward each other to urge the slips inwardly and firmly clamp between them and the shank 3 the intervening wall of the hose.

The manner of applying the clamp to the hose is illustrated in Figs. 5 and 6. Referring to Fig. 5: after the shank 3 of the nipple 2 has been inserted into the hose 1 until the flange 6 engages the end of the hose, the inner sleeve 19 is placed over the hose and the slips of the outer set 10 are arranged about the end of the hose with their lips 11 bearing on the outer side of the flange 6, after which the sleeve 18 is placed over the outer ends of the slips. The sleeve 19 is next engaged with the inner ends of the slips, and the two sleeves 18 and 19 are arranged with their ears 21 in alignment, and relatively long bolts 25 are inserted through the holes of the ears and nuts 26 are applied to their threaded ends. The nuts 26 are now drawn up until the sleeve 18 is forced inwardly over the slips of the set 10 sufficiently to firmly clamp the end of the hose between said slips and the outer portion of the shank 3, as shown in Fig. 6. The outer slips and sleeve 18 are then left where they are and the nuts 26 are backed off so as to permit the sleeve 19 to be drawn inwardly a considerable distance. The slips of the inner set 15 are then inserted between the sleeve 19 and the wall of the hose 1 with their outer ends engaging the inner ends of the outer slips and wlth the line of separation between them staggered with respect to the corresponding lines of the outer set of slips. The assembling of the parts has advanced to this stage in Fig. 6. Now, the nuts 26 are again drawn up to force the inner sleeve 19 outwardly and contract the slips of `the inner set so as to firmly clamp l the wall of the hose between them and the slips as the outer sleeve 18 bears to the outer set. The nuts 26 may now be removed the bolts 25 withdrawn and the shorter holte 23 substituted therefor. By drawing up the nuts 24 onto the bolts 23 suflciently, the

sleeves 18 and 19 may be drawn to their final positions, as indicated in Figs. 1 and 3. In I this final drawing up of the sleeves and the contraction of' the s1ips,'the material of the clamped portion of the hose is displaced to its maximum so that when the hose is liter subjected to high internal pressure and elon-v and` hose and nipple. The bead 7 being of greater diameter than the ribs 8, makes the 'oint in this region especially tight. Also, ecause of the fact that the lines of separation between the respective slips of the inner and outer sets are offset or staggered with respect to each other, any possibility of leakage or seepage incurring along these lines under high internal pressure is eliminated.

ItI is evident from the nature and function of the sli s, as hereinbefore described. that they will iave no injurious effect upon the hose, and on account of this, when a nipple becomes worn out or damaged in any way it may be removed and a new nipple subst1 tuted without the necessityV of cutting 0E the end of the hose. This obviates the need of shortening the hose when'making such repa1rs. 4 Y

It is desirable to have the inner ends of the sleeves spaced some distance from the corresponding ends of the slips when the parts are in final clamping condition, as illustrated in Figs. 1 and 2; and in case the walls of some sections of hose are too thin to bring about` this desirable effect, the hose may be wrapped with suitable material before applying the slips. V

Having thus described my invention, what I claim is:

1. In a hose coupling, the combination of a nipple 'including a coupling part at one end and a shank at the other, the shank'being adapted to be inserted into a hose, an outer and an inner set of slips surrounding the hose in the region of the shank and arranged in opposed relation to each other, the outer ends of the slips of the outer set having hold.I ing engagement with the nipple, the outer` surfaces of the slips of each set diverging in the direction of the other set, a sleeve sur- Cil rounding each set of slips, and means for forcing the sleeves toward each other.

2. In a hose coupling, the combination of a nipple including a couplin part at one end, a shank at the other, an a circumferential iange between said part and shank, the shank being adapted to be inserted into a hose, an outer and an inner set of slips surrounding the hose in the region of the shank and arranged in opposed relation to each other, the outer ends of the slips of the outer set having lips extending inwardly over the aforesaid iange, the outer surfaces of the slips of each set diverging in the direction of the other set, a sleeve surroundin each set of slips, and means for forcing t e sleeves toward each other.

3. In a hose coupling, the combination of a nipple including a coupling artat one end, a shank at the other, and a clrcumferential flange intermediate its ends, the shank being adapted to be inserted into a hose with the end of the latter abutting the inner side of said ange, an outer set of slips surrounding the hose and having lips engaged. over the outer side of said iange, an inner set of slips surrounding the hose and having their outer ends arranged in opposed relation to the inner ends of the outer slips, the outer surfaces of each set of slips diverging in the direction of the other set, a sleeve surrounding each set of slips, the inner surface 0f each sleeve being tapered to correspond to the taper of the outer surface of the slips wherewith it is arranged to engage and means for forcing the sleeves toward each other.

4. In a hose coupling, the combination of a nipple including a couplin part at one end, a shank at the other, an a circumferential flange intermediate its ends, the shank being adapted to be inserted into a hose with the end of the latter abutting the inner side of said flange, anouter set of slips surrounding the hose and having lips engaged over the outer side of said flange, an inner set of slips surrounding the hose and having their outer ends arranged in opposed relation to the inner ends of the outer slips, the outer surfaces of each set of slips diverging in the direction of the other set, a sleeve surrounding each set of slips,the adjacent e'nds of the `two sleeves havin perforated ears, and bolts extending throng the corresponding ears of the two sleeves for drawing said sleeves toward eachother. Y

5. In a hose coupling, the combination of a nipple 'including a coupling part at one end, a shank at the other, and a circumferential flange intermediate its ends, the shank being adapted to be inserted into a hose with said flange engaging the end thereof and being surrounded at a point between said flange and its inner end by a bead of substantial width and diameter, the shank being formed on opposite sides of said bead with spaced apart circumferential ribs, an outer set of slips surrounding the hose-and having lips engaged over the buter side of the aforesald iange, an inner set of slips surrounding the hose and having their outer ends engaging the inner ends of the outer slips in substantially the central plane of the aforesaid bead, each set of slips having transverse ribs on their inner sides which are spaced on opposite sides of the planes of the ribs on the shank, the `outer surfaces of each set of slips diverging in the direction of the other set, a sleeve surrounding each set of slips, and means for forcing the sleeves toward each other.

In testimony whereof, I hereunto aix my signature.

ERNEST J. SHAFFER. 

